| 研究実績の概要 |
Hierarchically porous fullerene crystals comprising of both micro- and mesoporous architectures are prepared and their vapor sensing performance were studied. For example, prototype sensor systems were fabricated upon immobilization of the fullerene rosettes onto surfaces of a quartz crystal microbalance (QCM),and selective sensing of formic acid was demonstrated as preliminary results for social-demanded toxic material sensing. The QCM sensor with fullerene rosette is categorized as one of the large response sensors among reported examples. In selectivity to formic acids against basic guests (formic acid/pyridine >30) or aromatic guests (formic acid/toluene >110), the fullerene rosette-based QCM
sensor also showed superior performance. Similarly, a novel molecularly-thin nitrogen-doped 2D fullerphene was successfully prepared by the thermal annealing
at 700 °C of a bottom-up assembled fullerene C60-ethylenediamine (EDA) thin
film results in formation of a nitrogen-doped ultrathin carbon film, fullerphene, which exhibits a hierarchically micro/mesoporous structure at its surfaces.
N-doping of fullerphene is dominated by pyrrolic and quaternary nitrogen
atoms, which allow selective and repetitive adsorption and desorption of lowmolecular-weight carboxylic acid vapors through noncovalent interactions and leaded to the superior sensitivity of fullerphene to formic acid over acetic acid in the vapor phase demonstrating that novel 2D fullerphene provides an attractive platform for the discrimination of carboxylic acids at the single-carbon-atom level.
|
